Global Design Effort Main Linac Technology System Kick-off Meeting Cavity Summary 20 Sept 2007 DESY Marc Ross

Global Design Effort Cavity Kick-off Meeting 2 SCRF EDR Kick Off meetings: –Cryomodule & Cryomodule –Cavity – production, processing and integration Hosted by KEK and DESY –(Thanks!)

Global Design Effort Fermilab GDE Meeting Please prepare & post parallel session agenda! At the Fermilab GDE meeting there will be 2 hours of closing plenary presentation for these critical systems. –ACD R & D and its goals/achievements The role of XFEL in the ILC; The differences –focus on difficult/complex issues (the kick off meeting discussions) Compatibility Interface specification Validation New initiatives, cost reduction, ?

Global Design Effort Findings from this meeting - integration It should be possible to construct a CM with a choice of key components from different suppliers –(also a linac, also a cavity assembly) –‘plug compatibility’ Develop a schematic plan for how this would be managed There are valid reasons to explore this possibility, even while retaining a ‘unified design’ goal –New shapes, cost cutting  List these reasons and develop supporting arguments Definition – requires interface and performance specifications Develop mechanics, and actual specifications to enable Some of the interface and performance specifications require development –‘reliability’ and ‘maintainability’ Identify ‘difficult’ specifications and draft

Global Design Effort Findings – ‘S0’ Gradient R & D remains top priority Review the justification for this priority, and its impact DESY ‘production’ 4 results represent the largest systematically prepared set of cavities to date –(to be published SRF 07) –Encouraging and stimulating results Review and summarize these results for basis of coming work

Global Design Effort Findings – ‘S0’ Taken together with US and KEK ’07 results, we have substantial, new, information to guide EDR R &D –Field emission generally reduced! How should the program take this into account US and KEK cavity processing and testing capacity is coming online in late 07/early 08. What is planned for commissioning and initial program Steady progress in diagnostics and analysis of cavity processing and interior surface Review and summarize these developments; prioritize directions

Global Design Effort Findings - Organizational A preliminary functional WBS exists and appears appropriate Complete this using project format (to be delivered!) The ‘down-selection’ process effort appears to be included Develop an example such process Validation tests are expected to be time consuming and may be ‘critical path’ –Time for new R & D initiatives? Develop and recommend a testing plan

Global Design Effort Findings - Industrialization XFEL Production plan, based on in-kind contributions from EU, is nearing maturity –Very exciting start for the project and for new infrastructure (SACLAY) Review this plan and summarize strategic implementation Substantial opportunities for mutually beneficial activities –But this will take ongoing discussions and effort Plan for these discussions - schedule

Global Design Effort Findings - Industrialization Lessons for ILC mass production are valid, even with design differences Evaluate ‘plug-compatibility’ suggestions v/v industrialization plan Design differences are interesting and should be discussed This should be part of the upcoming GDE / collab meetings

Global Design Effort Thanks to DESY & ILC Main Linac Tech Hosts! We look forward to the Fermilab meeting – and getting Comments from our community concerning these findings / recommendations.